Unique mechanics? In MY survival horror dating sim? It's more likely than you think!
I was just thinking about this game yesterday and how much I wanted there to be more of it, and now there is!
If you don't re-introduce payment options, it'll just push potential customers to other platforms where they CAN pay for the content they want. In other words, you'll lose potential profits.
I don't know if the Junji Ito reference is intentional, but whether it is or not this is still a fantastic little horror game.